BICEP2/Keck Array V: Measurements of B-mode polarization at degree angular scales and 150 GHz by the Keck Array

P. A R Ade; Z. Ahmed; R. W. Aikin; K. D. Alexander; D. Barkats; S. J. Benton; C. A. Bischoff; J. J. Bock; J. A. Brevik; I. Buder; E. Bullock; V. Buza; J. Connors; B. P. Crill; C. D. Dowell; C. Dvorkin; L. Duband; J. P. Filippini; S. Fliescher; S. R. Golwala; M. Halpern; S. Harrison; M. Hasselfield; S. R. Hildebrandt; G. C. Hilton; V. V. Hristov; H. Hui; K. D. Irwin; K. S. Karkare; J. P. Kaufman; B. G. Keating; S. Kefeli; S. A. Kernasovskiy; J. M. Kovac; C. L. Kuo; E. M. Leitch; M. Lueker; P. Mason; K. G. Megerian; C. B. Netterfield; H. T. Nguyen; R. O'Brient; R. W. Ogburn Iv; A. Orlando; C. Pryke; C. D. Reintsema; S. Richter; R. Schwarz; C. D. Sheehy; Z. K. Staniszewski; R. V. Sudiwala; G. P. Teply; K. L. Thompson; J. E. Tolan; A. D. Turner; A. G. Vieregg; A. C. Weber; J. Willmert; C. L. Wong; K. W. Yoon

doi:10.1088/0004-637X/811/2/126

BICEP2/Keck Array V: Measurements of B-mode polarization at degree angular scales and 150 GHz by the Keck Array

P. A R Ade, Z. Ahmed, R. W. Aikin, K. D. Alexander, D. Barkats, S. J. Benton, C. A. Bischoff, J. J. Bock, J. A. Brevik, I. Buder, E. Bullock, V. Buza, J. Connors, B. P. Crill, C. D. Dowell, C. Dvorkin, L. Duband, J. P. Filippini, S. Fliescher, S. R. GolwalaM. Halpern, S. Harrison, M. Hasselfield, S. R. Hildebrandt, G. C. Hilton, V. V. Hristov, H. Hui, K. D. Irwin, K. S. Karkare, J. P. Kaufman, B. G. Keating, S. Kefeli, S. A. Kernasovskiy, J. M. Kovac, C. L. Kuo, E. M. Leitch, M. Lueker, P. Mason, K. G. Megerian, C. B. Netterfield, H. T. Nguyen, R. O'Brient, R. W. Ogburn Iv, A. Orlando, C. Pryke, C. D. Reintsema, S. Richter, R. Schwarz, C. D. Sheehy, Z. K. Staniszewski, R. V. Sudiwala, G. P. Teply, K. L. Thompson, J. E. Tolan, A. D. Turner, A. G. Vieregg, A. C. Weber, J. Willmert, C. L. Wong, K. W. Yoon

Physics and Astronomy (Twin Cities)

Research output: Contribution to journal › Article › peer-review

80 Scopus citations

Abstract

The Keck Array is a system of cosmic microwave background polarimeters, each similar to the Bicep2 experiment. In this paper we report results from the 2012 to 2013 observing seasons, during which the Keck Array consisted of five receivers all operating in the same (150 GHz) frequency band and observing field as Bicep2. We again find an excess of B-mode power over the lensed-ΛCDM expectation of >5σ in the range 30 < ℓ < 150 and confirm that this is not due to systematics using jackknife tests and simulations based on detailed calibration measurements. In map difference and spectral difference tests these new data are shown to be consistent with Bicep2. Finally, we combine the maps from the two experiments to produce final Q and U maps which have a depth of 57 nK deg (3.4 μK arcmin) over an effective area of 400 deg² for an equivalent survey weight of 250,000 μK^-2. The final BB band powers have noise uncertainty a factor of 2.3 times better than the previous results, and a significance of detection of excess power of >6σ.

Original language	English (US)
Article number	126
Journal	Astrophysical Journal
Volume	811
Issue number	2
DOIs	https://doi.org/10.1088/0004-637X/811/2/126
State	Published - Oct 1 2015

Bibliographical note

Publisher Copyright:
© 2015. The American Astronomical Society. All rights reserved..

Keywords

cosmic background radiation
cosmology: observations
gravitational waves
inflation
polarization

Access

10.1088/0004-637X/811/2/126

OpenUrl availability

Full text

Cite this

Ade, P. A. R., Ahmed, Z., Aikin, R. W., Alexander, K. D., Barkats, D., Benton, S. J., Bischoff, C. A., Bock, J. J., Brevik, J. A., Buder, I., Bullock, E., Buza, V., Connors, J., Crill, B. P., Dowell, C. D., Dvorkin, C., Duband, L., Filippini, J. P., Fliescher, S., ... Yoon, K. W. (2015). BICEP2/Keck Array V: Measurements of B-mode polarization at degree angular scales and 150 GHz by the Keck Array. Astrophysical Journal, 811(2), Article 126. https://doi.org/10.1088/0004-637X/811/2/126

Ade, PAR, Ahmed, Z, Aikin, RW, Alexander, KD, Barkats, D, Benton, SJ, Bischoff, CA, Bock, JJ, Brevik, JA, Buder, I, Bullock, E, Buza, V, Connors, J, Crill, BP, Dowell, CD, Dvorkin, C, Duband, L, Filippini, JP, Fliescher, S, Golwala, SR, Halpern, M, Harrison, S, Hasselfield, M, Hildebrandt, SR, Hilton, GC, Hristov, VV, Hui, H, Irwin, KD, Karkare, KS, Kaufman, JP, Keating, BG, Kefeli, S, Kernasovskiy, SA, Kovac, JM, Kuo, CL, Leitch, EM, Lueker, M, Mason, P, Megerian, KG, Netterfield, CB, Nguyen, HT, O'Brient, R, Ogburn Iv, RW, Orlando, A, Pryke, C, Reintsema, CD, Richter, S, Schwarz, R, Sheehy, CD, Staniszewski, ZK, Sudiwala, RV, Teply, GP, Thompson, KL, Tolan, JE, Turner, AD, Vieregg, AG, Weber, AC, Willmert, J, Wong, CL & Yoon, KW 2015, 'BICEP2/Keck Array V: Measurements of B-mode polarization at degree angular scales and 150 GHz by the Keck Array', Astrophysical Journal, vol. 811, no. 2, 126. https://doi.org/10.1088/0004-637X/811/2/126

@article{fcc1a07db78c4aa3be6e2f110e57cb0a,

title = "BICEP2/Keck Array V: Measurements of B-mode polarization at degree angular scales and 150 GHz by the Keck Array",

abstract = "The Keck Array is a system of cosmic microwave background polarimeters, each similar to the Bicep2 experiment. In this paper we report results from the 2012 to 2013 observing seasons, during which the Keck Array consisted of five receivers all operating in the same (150 GHz) frequency band and observing field as Bicep2. We again find an excess of B-mode power over the lensed-ΛCDM expectation of >5σ in the range 30 < ℓ < 150 and confirm that this is not due to systematics using jackknife tests and simulations based on detailed calibration measurements. In map difference and spectral difference tests these new data are shown to be consistent with Bicep2. Finally, we combine the maps from the two experiments to produce final Q and U maps which have a depth of 57 nK deg (3.4 μK arcmin) over an effective area of 400 deg2 for an equivalent survey weight of 250,000 μK-2. The final BB band powers have noise uncertainty a factor of 2.3 times better than the previous results, and a significance of detection of excess power of >6σ.",

keywords = "cosmic background radiation, cosmology: observations, gravitational waves, inflation, polarization",

author = "Ade, {P. A R} and Z. Ahmed and Aikin, {R. W.} and Alexander, {K. D.} and D. Barkats and Benton, {S. J.} and Bischoff, {C. A.} and Bock, {J. J.} and Brevik, {J. A.} and I. Buder and E. Bullock and V. Buza and J. Connors and Crill, {B. P.} and Dowell, {C. D.} and C. Dvorkin and L. Duband and Filippini, {J. P.} and S. Fliescher and Golwala, {S. R.} and M. Halpern and S. Harrison and M. Hasselfield and Hildebrandt, {S. R.} and Hilton, {G. C.} and Hristov, {V. V.} and H. Hui and Irwin, {K. D.} and Karkare, {K. S.} and Kaufman, {J. P.} and Keating, {B. G.} and S. Kefeli and Kernasovskiy, {S. A.} and Kovac, {J. M.} and Kuo, {C. L.} and Leitch, {E. M.} and M. Lueker and P. Mason and Megerian, {K. G.} and Netterfield, {C. B.} and Nguyen, {H. T.} and R. O'Brient and {Ogburn Iv}, {R. W.} and A. Orlando and C. Pryke and Reintsema, {C. D.} and S. Richter and R. Schwarz and Sheehy, {C. D.} and Staniszewski, {Z. K.} and Sudiwala, {R. V.} and Teply, {G. P.} and Thompson, {K. L.} and Tolan, {J. E.} and Turner, {A. D.} and Vieregg, {A. G.} and Weber, {A. C.} and J. Willmert and Wong, {C. L.} and Yoon, {K. W.}",

year = "2015",

month = oct,

day = "1",

doi = "10.1088/0004-637X/811/2/126",

language = "English (US)",

volume = "811",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "IOP Publishing Ltd.",

number = "2",

}

TY - JOUR

T1 - BICEP2/Keck Array V

T2 - Measurements of B-mode polarization at degree angular scales and 150 GHz by the Keck Array

AU - Ade, P. A R

AU - Ahmed, Z.

AU - Aikin, R. W.

AU - Alexander, K. D.

AU - Barkats, D.

AU - Benton, S. J.

AU - Bischoff, C. A.

AU - Bock, J. J.

AU - Brevik, J. A.

AU - Buder, I.

AU - Bullock, E.

AU - Buza, V.

AU - Connors, J.

AU - Crill, B. P.

AU - Dowell, C. D.

AU - Dvorkin, C.

AU - Duband, L.

AU - Filippini, J. P.

AU - Fliescher, S.

AU - Golwala, S. R.

AU - Halpern, M.

AU - Harrison, S.

AU - Hasselfield, M.

AU - Hildebrandt, S. R.

AU - Hilton, G. C.

AU - Hristov, V. V.

AU - Hui, H.

AU - Irwin, K. D.

AU - Karkare, K. S.

AU - Kaufman, J. P.

AU - Keating, B. G.

AU - Kefeli, S.

AU - Kernasovskiy, S. A.

AU - Kovac, J. M.

AU - Kuo, C. L.

AU - Leitch, E. M.

AU - Lueker, M.

AU - Mason, P.

AU - Megerian, K. G.

AU - Netterfield, C. B.

AU - Nguyen, H. T.

AU - O'Brient, R.

AU - Ogburn Iv, R. W.

AU - Orlando, A.

AU - Pryke, C.

AU - Reintsema, C. D.

AU - Richter, S.

AU - Schwarz, R.

AU - Sheehy, C. D.

AU - Staniszewski, Z. K.

AU - Sudiwala, R. V.

AU - Teply, G. P.

AU - Thompson, K. L.

AU - Tolan, J. E.

AU - Turner, A. D.

AU - Vieregg, A. G.

AU - Weber, A. C.

AU - Willmert, J.

AU - Wong, C. L.

AU - Yoon, K. W.

PY - 2015/10/1

Y1 - 2015/10/1

N2 - The Keck Array is a system of cosmic microwave background polarimeters, each similar to the Bicep2 experiment. In this paper we report results from the 2012 to 2013 observing seasons, during which the Keck Array consisted of five receivers all operating in the same (150 GHz) frequency band and observing field as Bicep2. We again find an excess of B-mode power over the lensed-ΛCDM expectation of >5σ in the range 30 < ℓ < 150 and confirm that this is not due to systematics using jackknife tests and simulations based on detailed calibration measurements. In map difference and spectral difference tests these new data are shown to be consistent with Bicep2. Finally, we combine the maps from the two experiments to produce final Q and U maps which have a depth of 57 nK deg (3.4 μK arcmin) over an effective area of 400 deg2 for an equivalent survey weight of 250,000 μK-2. The final BB band powers have noise uncertainty a factor of 2.3 times better than the previous results, and a significance of detection of excess power of >6σ.

AB - The Keck Array is a system of cosmic microwave background polarimeters, each similar to the Bicep2 experiment. In this paper we report results from the 2012 to 2013 observing seasons, during which the Keck Array consisted of five receivers all operating in the same (150 GHz) frequency band and observing field as Bicep2. We again find an excess of B-mode power over the lensed-ΛCDM expectation of >5σ in the range 30 < ℓ < 150 and confirm that this is not due to systematics using jackknife tests and simulations based on detailed calibration measurements. In map difference and spectral difference tests these new data are shown to be consistent with Bicep2. Finally, we combine the maps from the two experiments to produce final Q and U maps which have a depth of 57 nK deg (3.4 μK arcmin) over an effective area of 400 deg2 for an equivalent survey weight of 250,000 μK-2. The final BB band powers have noise uncertainty a factor of 2.3 times better than the previous results, and a significance of detection of excess power of >6σ.

KW - cosmic background radiation

KW - cosmology: observations

KW - gravitational waves

KW - inflation

KW - polarization

UR - http://www.scopus.com/inward/record.url?scp=84945564868&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84945564868&partnerID=8YFLogxK

U2 - 10.1088/0004-637X/811/2/126

DO - 10.1088/0004-637X/811/2/126

M3 - Article

AN - SCOPUS:84945564868

SN - 0004-637X

VL - 811

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

M1 - 126

ER -

BICEP2/Keck Array V: Measurements of B-mode polarization at degree angular scales and 150 GHz by the Keck Array

Abstract

Bibliographical note

Keywords

Access

OpenUrl availability

Other files and links

Fingerprint

Cite this